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For refcode 2000AJ....120.1479H:
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2000AJ....120.1479H A SEARCH FOR ENVIRONMENTAL EFFECTS ON TYPE Ia SUPERNOVAE MARIO HAMUY Steward Observatory, University of Arizona, Tucson, AZ 85721; mhamuy@as.arizona.edu S. C. TRAGER Observatories of the Carnegie Institution of Washington, 813 Santa Barbara Street, Pasadena, CA 91106; sctrager@ociw.edu PHILIP A. PINTO Steward Observatory, University of Arizona, Tucson, AZ 85721; ppinto@as.arizona.edu M. M. PHILLIPS Las Campanas Observatory, Carnegie Institution of Washington, Casilla 601, La Serena, Chile; mmp@lco.cl R. A. SCHOMMER Cerro Tololo Inter-American Observatory, National Optical Astronomy Observatories,2 Casilla 603, La Serena, Chile; rschommer@noao.edu VALENTIN IVANOV Steward Observatory, University of Arizona, Tucson, AZ 85721; vivanov@as.arizona.edu AND NICHOLAS B. SUNTZEFF Cerro Tololo Inter-American Observatory, National Optical Astronomy Observatories,2 Casilla 603, La Serena, Chile; nsuntzeff@noao.edu Received 2000 April 4; accepted 2000 May 8 ABSTRACT We use integrated colors and B and V absolute magnitudes of Type Ia supernova (SN) host galaxies in order to search for environmental effects on the SN optical properties. With the new sample of 44 SNe we confirm the conclusion by Hamuy et al. that bright events occur preferentially in young stellar environments. We find also that the brightest SNe occur in the least luminous galaxies, a possible indication that metal-poor neighborhoods produce the more luminous events. The interpretation of these results is made difficult, however, because of the fact that galaxies with younger stellar populations are also lower in luminosity. In an attempt to remove this ambiguity, we use models for the line strengths in the absorption spectrum of five early-type galaxies, in order to estimate metallicities and ages of the SN host galaxies. With the addition of abundance estimates from nebular analysis of the emission spectra of three spiral galaxies, we find possible further evidence that luminous SNe are produced in metal-poor neighborhoods. Further spectroscopic observations of the SN host galaxies will be necessary to test these results and assist in disentangling the age and metallicity effects on Type Ia SNe. Key words: distance scale-supernovae: general ======================================================================= 2001AJ....122.3506H ERRATUM: "A SEARCH FOR ENVIRONMENTAL EFFECTS ON TYPE Ia SUPERNOVAE" [ASTRON. J. 120, 1479 (2000)] MARIO HAMUY Steward Observatory, University of Arizona; mhamuy@as.arizona.edu S. C. TRAGER Observatories of the Carnegie Institution of Washington PHILIP A. PINTO Steward Observatory, University of Arizona M. M. PHILLIPS Las Campanas Observatory, Carnegie Institution of Washington R. A. SCHOMMER Cerro Tololo Inter-American Observatory VALENTIN IVANOV Steward Observatory, University of Arizona AND NICHOLAS B. SUNTZEFF Cerro Tololo Inter-American Observatory Received 2001 August 28; accepted 2001 September 5 Ken Nomoto, Chiaki Kobayashi, and Hideyuki Umeda have brought to our attention that the [O/H] abundances for the three spiral galaxies listed in Table 3 were incorrect. The problem was due to the fact that the log (O/H) values adopted for these galaxies corresponded to number ratios and the assumed solar value, log (O/H)_sun_ = -1.93 +/- 0.07, corresponded to mass ratio. With the correct solar value for number ratio, log (O/H)_sun_ = -3.13 +/- 0.07 (N. Grevesse, A. Noels, & A. J. Sauval, in ASP Conf. Ser. 99, Cosmic Abundances, ed. S. S. Holt & G. Sonneborn [San Francisco: ASP], 117 [1996]), the [O/H] abundances for the three spirals increase by 1.2 dex. The correct abundances are given in the new Table 3. See Journal.
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